EKG RHYTHMS Questions with Correct Solutions
Question:
1. Normal Sinus Rhythm
Answer:
60-100 bpm all complexes normal and evenly spaced (P, QRS, T)
Question:
2. Sinus Arrest
Answer:
- SA node doesn't fire
- notice absence of P-wave for a complete cycle (a missed cycle)
Question:
3. Sinus arrhythmia
Answer:
all complexes normal but rhythmically irreg
- normal finding (esp in young pts) that has to do with breathing (rate: inhale-increase,
exhale-decrease)
Question:
4. Sinus Bradycardia
Answer:
<60 normal sinus rhythm
Question:
5. Sinus Tachycardia
,Answer:
>100 (100-150) normal sinus rhythm
Question:
6. Wandering atrial pacemaker
Answer:
Hint: try never to pick this
- impulse originate from varying points in atria
- variation in P wave contour, PR-I, PP-I and thus RR-I
Question:
7. P wave vs T wave
Answer:
P generally smaller than T
Question:
8. MAT (multifocal atrial tachy)
Answer:
- impulse originates at diff places in atria so P waves diff and intervals might not be consistent
- assoc w/ severe pulm dz
Question:
9. Atrial Fibrillation
Answer:
A: 350-450 (atria quivering)
- irreg-irreg rhythm (R-RI=irreg) **unsure/no P-wave (non-distinguishable)**
- irreg rhythm BUT reg QRS! Danger: increase the risk of thromboemoblic events don't
convert unless occurring less than 48 hrs, if don't know pt need to be put on thrombolytics)
, Question:
10. Atrial Flutter
Answer:
A: 250-350
- "saw tooth" p-waves
- a continuous rapid sequence of atrial complexes from a single rapid-firing atrial focus (hint:
if see 2 P waves and QRS think A Flutter)
Question:
11. Junctional Escape beats
Answer:
retrograde atrial depolarization P' is inverted
Question:
12. Junctional rhythm
Answer:
40-60 Regular! -impulse from AV node w/ retro/antegrade transmission
- P wave often inverted/buried/follow QRS
- slow rate
- narrow QRS (not wide like ventricular)
Question:
13. Junctional Tachycardia
Answer:
>60 bpm (ms. K; 150-250)
- KEY: will be regular (consistent)
- AV junction produces a rapid sequence of QRS-T cycles
- p-wave often inverted/buried/follow QRS
Question:
1. Normal Sinus Rhythm
Answer:
60-100 bpm all complexes normal and evenly spaced (P, QRS, T)
Question:
2. Sinus Arrest
Answer:
- SA node doesn't fire
- notice absence of P-wave for a complete cycle (a missed cycle)
Question:
3. Sinus arrhythmia
Answer:
all complexes normal but rhythmically irreg
- normal finding (esp in young pts) that has to do with breathing (rate: inhale-increase,
exhale-decrease)
Question:
4. Sinus Bradycardia
Answer:
<60 normal sinus rhythm
Question:
5. Sinus Tachycardia
,Answer:
>100 (100-150) normal sinus rhythm
Question:
6. Wandering atrial pacemaker
Answer:
Hint: try never to pick this
- impulse originate from varying points in atria
- variation in P wave contour, PR-I, PP-I and thus RR-I
Question:
7. P wave vs T wave
Answer:
P generally smaller than T
Question:
8. MAT (multifocal atrial tachy)
Answer:
- impulse originates at diff places in atria so P waves diff and intervals might not be consistent
- assoc w/ severe pulm dz
Question:
9. Atrial Fibrillation
Answer:
A: 350-450 (atria quivering)
- irreg-irreg rhythm (R-RI=irreg) **unsure/no P-wave (non-distinguishable)**
- irreg rhythm BUT reg QRS! Danger: increase the risk of thromboemoblic events don't
convert unless occurring less than 48 hrs, if don't know pt need to be put on thrombolytics)
, Question:
10. Atrial Flutter
Answer:
A: 250-350
- "saw tooth" p-waves
- a continuous rapid sequence of atrial complexes from a single rapid-firing atrial focus (hint:
if see 2 P waves and QRS think A Flutter)
Question:
11. Junctional Escape beats
Answer:
retrograde atrial depolarization P' is inverted
Question:
12. Junctional rhythm
Answer:
40-60 Regular! -impulse from AV node w/ retro/antegrade transmission
- P wave often inverted/buried/follow QRS
- slow rate
- narrow QRS (not wide like ventricular)
Question:
13. Junctional Tachycardia
Answer:
>60 bpm (ms. K; 150-250)
- KEY: will be regular (consistent)
- AV junction produces a rapid sequence of QRS-T cycles
- p-wave often inverted/buried/follow QRS
